Define the following key terms .
1. contention-based
2. collision fragment
3. address resolution protocol (arp)
4. mac address table
5. asymmetric switching
6. arp table
7. arp cache
8. default gateway
9. cyclic redundancy check (crc)
10. organizationally unique identifier (oui)

Write a program that prompts the user to input a string. the program then uses the function substr to remove all the vowels from the string. for example, if str = "there", then after removing all the vowels, str = "thr". after removing all the vowels, output the string. your program must contain a function to remove all the vowels and a function to determine whether a character is a vowel.

Elements such as fonts colors visual structure graphics and the interface of a web page should complement each other to ensure blank

Which of the following is not a way in which trees benefit the environment? a. they remove a significant amount of carbon dioxide from the atmosphere. b. they remove a significant amount of oxygen from the atmosphere. c. their roots hold soil in place, reducing rates of erosion. d. they remove ozone and particulates from the atmosphere. select the best answer from the choices provided a b c d